|
Re: paper: Talon, Victor884, Victor888, and Jaguar speed vs torque tests
Quote:
Originally Posted by Joe Ross
That's great.
Could you use the same axis settings for all graphs, to make it easier to compare?
How were the PWM pulse widths chosen?
|
Ether did these tests in my lab. The PWM pulse widths were selected to provide a range, in 50 us increments, that fully exercised each controller; i.e., we increased the pulse width until further increases did not yield increased speed. This limit was different for each controller.
I see what you mean about the axis settings -- while they are all the same physical size, the torque axis tick labels and gridlines for the Victor 888 do not include odd multiples of 0.1 N-m, as the other do. However, if you blink between the graphs for different controllers there is no shift in scale or origin, so they are actually quite easy to compare.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
 since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
Last edited by Richard Wallace : 02-11-2012 at 17:50.
|